disable/remove create new item button in product cockpit

Please help me to disable/remove the "+" plus icon which is used to create new products in product cockpit. I just changed the below properties in project.properties in productCockpit, which did not help out. productcockpit.default.contextarea.toolbar.enableNewItemButton=false productcockpit.default.contextarea.list.hideNewItemButton=true

Please do the needful. PFA the required screenshot